On Sat, 30 Sep 2017 14:03:40 +0100
Rob Morley  wrote:

> On Sat, 30 Sep 2017 01:12:32 -0500
> Michael J. Mahon  wrote:
>
>
> > For heating systems with lags of hours, it is important to
> > anticipate a future need for heat as well as anticipating the
> > considerable overshoot that will occur after the heat is switched
> > off. I found this simple PWM approach quite effective.
> >
> PWM usually uses a frequency somewhat greater than 0.000023 Hz.  :-)
>
I meant 0.000012 Hz.

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